Ahmedabad, Gujarat, India
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| Introduction | This test covers determination of the density of freshly mixed concrete and gives formulas for calculating the yield, cement content, and air content of the concrete. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials. Bulk density is determined by filling a container of known volume and mass of concrete required to fill the container divided by the volume . |
| General Description & Specification: | Made from thick walled Mild steel or cast aluminum. Stout and rigid to retain form and Precision machined for true measurements. Complete with handles for easy carriage. It comprises of set of two measures 20 litres |
IntroductionUsed for specific gravity and absorption of fine aggregates. The equipment comprises of a conical metal mould 1.5 dia at the top, 3.5 dia at the base and 2.7/8 in height and a metal tamping rod weighing 12 ounces and having a flat circular tamping face 1 dia.
| Introduction | This test is used to determine the elapsed time between batching of a concrete sample and when it is deemed by standard methods to have set. The method involves measuring the penetration resistance of a test sample, which has had coarse particles removed at periodic intervals. It is particularly useful, in determining the effect on setting time of admixtures in the concrete, where these may have been introduced specifically to increase the setting time. |
| It consists of cylindrical spring housing with a plunger attached to the top of the spring. Penetration needle is attached to the other end of the spring housing. The plunger is graduated in 1 kg divisions, to a maximum capacity of 60kg, which can be read with respect to the top end of the spring housing. A set of six needle points with areas of 645, 323, 161, 65, 32 and 16mm2 are provided. Supplied complete in a wooden carrying case. | |
| General Descriptions & Specifications | The Concrete Mixers are available in two versions for Laboratory or field use. The field models are hand operated. This portable concrete mixer has rubber tyred wheelsand a towing tongue so that it can be towed and moved around by hand. Its rotationis powered by single-phase electric motor or by hand . The lever allows the concrete to be tipped into a wheel-barrowor mixing pan. The driving shaft is mounted on sealed ball bearing The counter balanced drum swivels and tilt 360 for easy and complete discharge. |
| Pocket Penetrometer | Consists of a needle having face area 3/10 sq.cm. and graduated at a distance of 25mm. The needles point is an integral part of barrel which houses a calibrated spring. The spring is confined in a sleeve. The resistance offered by the concrete mortar is shown on the direct reading scale with a marker ring which holds its position when released. Scale range is 0-50 kg/cm2 when the penetration resistance reaches a value of 35kg/cm2 the concrete is assumed initially set. Supplied complete in a leather carrying case. AS PER ASTM C-403 . |
| Introduction | Air content of fresh concrete is normally measured, by the use of a special air meter, to assess whether the concrete contains the required amount of air. This would be measured when airs entrapment or entrainment is required by the concrete design. The method uses the principle of replacing the air in a known volume of concrete with water, the volume of which can then be measured. |
| General Description & Specification: | The apparatus consists of a pressure tight flanged cylindrical measuring bowl of specified volume in accordance with size of aggregate to be tested. The bowl is fitted with a removable flanged conical cover assembly with the help of a airtight sealing gasket. The conical cover has an air valve and a pet cock for bleeding off the water. A transparent cylindrical stand pipe, which is graduated in air content, is fixed to the conical cover assembly. |
| Pressure is applied to the specimen with the help of pressure bulb and the pressure is recorded on the pressure gauge which is mounted on the stand pipe. The whole assembly is mounted on a flat base. | |
| Standard Accessories: | Calibration cylinder with spring clamp, Trowel, Tamping rod, Straight edge, Rubber mallet andmeasure. 1 No. each |
